The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2016
Filed:
Mar. 15, 2013
Applicant:
Cameron Rig Solutions, Inc., Houston, TX (US);
Inventors:
Richard O. Bradley, Cypress, TX (US);
Michael R. Netecke, Houston, TX (US);
Assignee:
Cameron Rig Solutions, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 19/16 (2006.01); E21B 17/042 (2006.01);
U.S. Cl.
CPC ...
E21B 17/042 (2013.01); E21B 19/16 (2013.01);
Abstract
A top drive system is provided. In one embodiment, a top drive includes a drive stem and a load nut with mating threaded surfaces that enable the drive stem to be threaded through the load nut and to support weight of a connected drill string via the load nut. One or both of the mating threaded surfaces may have a threadform with one or more undercut thread roots. Additionally, a portion of the mating threaded surfaces, such as thread roots of the drive stem, can be shot-peened. Additional systems, devices, and methods are also disclosed.